Demountable rim for wheels.



J. 'W. FARNOPF/ DEMOUNTABLE RIM FOR WHEELS.

APPLIOATION PILED AUG. 29, 1910.

Patented Jan. 10,1911,

3 8HEETB-BHEBT 1.

J. W. PARNOFF. DEMOUNTABLB RIM FOR WHEELS.

APPLICATION FILED AUG. 39, 191 0.

Patented Jan.'10,1911.

if PAT r FFIQE...

JAY w. nsn orr, or lisnrrnno, nnw YORK, ASSIGNOR or ONE-HALF 'ro WALTER, a. BEIMAN," or BUFFA O, NEW YORK.

' thereto.

same viewed from the inner side with part DEMOUNTABLE RIM roa WHEELS.

Specification of Letters Patent.

Fatented Jan. 10, 1911.

Application filed August 29, 1910. Serial No. 579,501.

demountable rim which is adapted to carry .an inflated tire and permit of attaching this tire in its inflated condition to the wheel.

It is the object of. this invention to provide improved means for attaching the demountable rim to or detaching the same from the wheel, which means are simple in construction, more easily manipulated and hold the rim more reliably in place.

In the accompanying drawings consisting of 3 sheets: Figure 1 is an outside elevation of awheel showing one form of my improved means for demountably attaching the tire Fig. 2 is a similar View of the of the outer bearing ring broken away and showing part of the housing removed which incloses the shifting mechanism of the looking ring. Fig. 3 1s a fragmentary section in line 3-3, Fig. 4. Fig. 4 is a vertical transverse section in line M, Fig. 2. I Fig. 5 is a fragmentary cross section, on an enlarged scale, in the correspondingly numbered line in Fig. 2. Fig. 6 is a fragmentary section, on an enlarged scale, taken in line 6-6, Fig. 2 looking outwardly. Fig. 7 is a fragmentary section, on an enlarged scale, in line 7-7, looking outwardly. Fig. 8 is a fragmentary section, on an enlarged scale, in line 88, Fig. 2. Fig. 9 is a fragmentary section, similar to Fig. 5, and show ing a modified construction of the dcmountable rim. Fig. 10 is a side elevation, similar to Fig. 1, showing a modification of my invention. Fig. '11 is an elevation thereof viewed from the'opposite side. F 12 is a fragmentary cross section, on an enlarged scale, in line 12-12, Fig. 11.

Similar letters of reference indicate corresponding parts throughout the several views.

Although my invention is applicable to wheels of various forms that shown in the drawings comprises a hub A, a felly B and a plurality of radial spokes C connecting the hub and felly. The demountable or supplemental rim may also be variously constructed but preferably comprises a cylindrical body D, a fixed hook-shaped retaining flange d arranged at one edge of the body and adapted to engage with the bead e on one side of the tire E and a detachable hook shaped retaining flange f arrangedon the opposite edge of the body D and adapted to engage with the-bead e on the other side of said tire. I

The means which are shown in Figs. 17 for detachably connecting the demountable rim and wheel and which embody one form of my invention are constructed as follows: G represents an inner bearing ring which is secured to the periphery of the wheel felly and which has its inner side or bore constructed of cylindrical form while its outer side is constructed generally of tapering or conicalform andflprovided with a low conical face 9 adjacent to the outer side of the wheel, ahigh conical face 9 adjacent to the inner side of the wheel, and a depressed face 9 between these two conical faces. inner side or boreof the demountable rim is secured by means of rivet h or otherwise, an

To the the inner side of said channel, ahigh tapering orconical face 2' arranged at the outer side of said channel, an annular stop flange or shoulder 7' arranged at the outer side of said high conical face and projecting inwardly therefrom, and a set or plurality of outer locking lugs is projecting inwardly from the outer bearing ring at the inner edge thereof but separated from the adjacent low conical face of said ring byjanintervening locking space. parts, the low bearing face of the outer bearing ring bears against the high face of the inner bearing ring and -the high conical face of the outer bearing ring engages with the lower 'face of the .inner bearing ring, the parts being thus assembled by slipping the demountable rim inwardly with its bearing ring over the bearing ring of the felly. This inward. movement of the demountable rim is limited by the cooperation of the inclined or conical faces of the bearing rings on the demountable rim and the feldy and In the assembled condition of the other owing to the depression in the centralpar'tsof the inner bearing ring and the depression in the central part of the outer bearing ring, thereby confining the actual n contact between these bearing rings to the conical edge portions thereof, whereby the tendency of these parts to stick together, due to rusting and difficulty of separating them, which otherwisewould occur, is avoided.

After the demountable 'rim has been slipped upon the wheel together with the inflated tire thereon this rim is locked against removal by means of'a locking device of which the lugs 70 form a part and of which the remaining parts are constructed as follows:. L represents a locking ring mounted ,on the inner side of the wheel felly so as to be capable of a limited rotary movement thereon but held against lateral displacement relatively to the wheel. The preferred means for thus guiding or mounting the locking r'ingon the wheel. felly, which .is shown in Figs. 2, 4, 5, 6,7 and 8, comprises a plurality of guide screws meach of which is arranged in asegmental concentric slot M formed in the locking ring and engaging its threaded end with the felly While its head bearsragainst the locking ring and h'olds' the same. against the adjacent edge of they inner bearing ring. At its outer edge the locking ring is provided'.,with a set or plurality of locking lugs Z which areadapted to cooperate with the o'uterset of-loeking lugs 70 of the outer bearing ring for the purpose of holding the tire and its demountable rim-against removal from the wheel. WVhen assembling-the denlountable rim and wheel the locking ring is so placed that its-locking lugs l are in line with the spaces between the locking lugs 72 of the demountable rim in which position of the parts the demountable.

rim may be slipped over the bearing ring of the wheel and" its locking, lugs passed through the spaces between the locking lugs of the lockingring. After the parts have been th'us assembled the locking ring is turned on the wheel so that its locking lugs pass-behind the locking lugs of the demountable rim, thereby preventing separation of the demountable rim fromthe wheel.

order to produce a binding or wedge action 'of' the-cooperating locking lugs against each other the cotiperating surfaces of these lu s are arranged at anjangle to each ether this being preferably effected by inclining the working face "Z of the locking lugs 0nthe ring, as shown in Fig. 7. As the lugs of the locking ring engage with the working sur-- faces .of the locking lugs on the outer bear '65 ing'ring, a wedge action is produced which operates to draw the demountable rim tightly upon the wheel and prevent the parts from rattling when in usez A reverse movement of the locking ring withdraws its locking lugs from behind the locking In s of the demountable rim so as to permit 0 removing the rimand the tire carried thereby from the wheelf This oscillating or rotating movement of the locking ring for locking or unlocking the demountable rim may be effected by various means but preferably by the shifting mechanism which is shown 1n,

Figs. 1, 2, 6 and-8 and which is constructed as-follows: On the inner side of the felly is wheel. Arranged lengthwise in this casing is a longitudinal worm shaft 0 whichis provided at one end with a worm 0 and at its opposite end with a driven bevel or miter gear wheel 0 Said shaft together with its worm and bevel wheel are journaled within the casing by engaging that end of the shaft adjacent to its worm with a bearing 7; which is formed between the opposing adjacent parts of the casing sections,.wl1ile the hub of the bevel wheel 0 at'the opposite ends of this shaft is journaled in a bearing p formed between the opposing sides ofthe adjacent parts of the casing sections, as shown in Fig. 6. The worm and driven bevel wheel are both arranged within the casing and bear against opposite ends of the same,

thereby holding the worm shaft and the parts carried thereby against axial movement within the casing. The worm engages on itsouter'side with a segmental gear rack Q which is secured to the locking ring at the 'inner edge thereof and projects inwardly is transmitted by the' intermeshing bevel wheels to the worm shaft and worm, thereby 1 causing the gear rack which meshes wit the worm and the locking ring connected with the gear rack to be moved circumferentially on the wheel either into its operative or into its inoperative position. Inasmuch as the gear rack is incapable. of turnsurface or channel separate bearing blocks or ing the worm no separate means. are required for holding the locking ring in its adjusted position.

Instead of making the outer bearing ring separate from the demountable rim, as shown in Figs. 1-5, the surfaces carried by this rim may be formed integrally thereon, as shown in Fig. 9 in which the receding cen-' tral surface or channel 2' the inner low conical face 2", the outer high conical face i, the outer stop flange j and the inner locking lugs I0 are formed integrally with the body H of the demountable rim. The first described construction is particularly adapted for applying my invention to wheels which are already in use while the last mentioned embodiment of inyinvention is applicable to wheels while the same are being made.

In order to prevent the demountable rim from turning with reference, to the wheel, the inner bearing ring is provided within its channel with one or more dowels or .pins 8 which engage with socketss in the periphcry of the inner bearing ring, as shown in Figs. 8 and 4. These dowels and sockets are arranged only on one side of the wheel and demountable the gearing which shifts the locklng ring. For the purpose of engaging or disengaging the dowel pins and sockets the demountable rim is tilted with reference to the wheel. By depressing or hollowing the central part of the inner bearing ring between the conical bearinwsurt'aces on opposite sides of said central part sufiicient clearance is provided to permit the rim to be tilted in the manner describedwithout interference between thesame.

In the modified construction of my invention shown in F igs.- 10-12 a plurality of sections T are secured at intervals by means of rivets t or otherwise to the inner side of the demountable rim. Each of these blocks is provided centrally on its bore with a depressed u, an inclined seat a at its outer edge, a low conical face a on its inner edge which is adapted to engage with rim and preferably opposite to the high conical face i on the inner bearing ring and an inwardly projecting locking lug 76 at its inner edge which is engaged'by a locking lug l of the locking ring L.

For the purpose of a filling the space between thelouter parts of the demountable rim and wheel and support these parts reliably upon each other asplit wedge-shaped fil ing ring V is provided which bearsat its periphery against the bore of the demountable rim while its bore is of conical form and bearsagainst the low conical'face g of the inner bearing ring. On its inner side the filling ring is provided with an inclined shoulder 11 engaging with the correspond:

ing shoulder a on the adjacent end of the blocks The filling ringis also provided on its outer side adjacent to its bore with a stop flange or. shoulder a: which bears against the outer side of the wheel felly and it is heldagainst displacement-by engagement of the shoulder 31 on the demountable rim with the outer side'of the filling ring, as

shown in Fig. 12.

I claimas my invention:

The combination'of a 'wheel having its telly provided with a bearing face, a tire supporting rim provided with a bearin face engaging with that'of said telly an also provided with a set of locking lugs, a lock-.

ing ring rotatable on the folly. and provided with a set of locking lugs adapted to engage with the lugs of the rim, and means for turning :said ring into and out of its operative position comprising a gear rack arranged on'said ring, 'a worm shaft journaled in bearings on the telly and provided with a worm engaging with said gear rack and also provided with a bevel wheel and anoperat-- ing shaft journaled in a bearing on the telly and provided with a bevel wheel meshing with the bevel wheel on said worm shaft.

Witness my hand this 27th day of August,

' JAY W. FARNOFF. lVitne'sses: WALTER J. REIMAN, THEO. L. Porr. 

